What does the gdp value in percentage mean??

ESurvey mentioned GDP to be 7.5%. It is 7.5% of what?? Of last year? Base Year?

Why does rupee weakens when FII take back their invested money??

Why does rupee weakens when FII take back their invested money??

What all affects the FOREX reserves and how?

So I read somewhere that increase in FDI increased the FOREX reserves and also that a strengthening rupee increases the reserves. Can anyone explain me the basic ideology or principle behind this